Bolster for car-trucks



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j UNITED vlSTATES PATENT i OEEICE. l'

WILLIAM J. MCCOY AND BART DEAN, OFVJEFFERSONVILLE, INDIANA.

B'QLSTER FOR CAR-TRUCKS.

SPECIFICATION forming part of Letters Patent No. 242,670, dated June '7, .1881.

` Application sied nprn 21,1ss1. (No model.)

To all whom it may concern:

Be it known that we, WILLIAM J. MCGOY and BART DEAN, citizens of the United States, residing at Jeffersonville, in the county of Clarke and State of Indiana, have invented new and useful Improvements in Top Bolsters for Railway-Car Trucks, of which the following is a specification.

This invention relates to top bolsters for cartrucks, the object being to provide a simple means whereby the bolster may be forined of two separate beams united by blocks and plates in such a manner as to leave between them an intervening space or spaces for the passage of necessary bolts, and thus obviate the danger of weakening the bolster arising from boring it at the center for the passage of the kingbolt; and the invention consists in the construction and arrangement of parts, as hereinafter more fully described and claimed.

In the accompanying drawings, which fully illustrate the invention, Figure 1 is a side view of a cartruck embodying our improvements. Fig. 2 is a side view of our improved bolster, partly in section. Fig. 3 is a top view; and Fig. 4 is a transverse section.

Like letters indicate like parts in the several views.

A are the wheels, B the journalboxes, and C C C2 are iron frames or bars attached to and connecting the j ournal-boxes with the holsters.

The lower bolster, D, rests upon the lower bars, C, and supports rubber blocks or other suitable sprin gs, E E, of any desired construction, upon which, in turn, rests the top bolster, F, that passes under the upper arch-bar, C. On the sides of the bolster F, at-each end, are guide-blocks F', which are groved for engagement with the vertical bars G G', upon which they slide. By this means the holsters have a flexible connection with the journal-boxes that prevents undue strain from sudden jars in passing over unequal tracks.

In order to overcome some of the more common difficulties experienced in obtaining wellseasoned timber of suitable dimensions for the top bolsters of car-trucks, and also to avoid the necessity of boring such holsters at the center for the passage of the king-bolt, it has been found of advantage to construct the bolsterof two separate beams, which may, if desired, be of less than half the size that would be otherwise required, and, if properly braced and connected, will be of equal, if not increased, strength. These beams a a are placed parallel to each other and separated by intervening blocks b, -that are secured between them at the ends of the bolster. The blocks b extend far enough to support the side bearings, b', and are of such width or thickness that a space of about two inches, preferably, is left between the side beams.

At the center of the top bolster are the top and bottom plates, Gr H, which are formed with central lugs or strut-flanges, c, that pass between the beams a a for the purpose of holding them apart. These plates Gr H are also provided with pins or nipples d, which-enter the side beams, a a, and prevent them from spreading or springing. The top and bottom plates are securely attached to the bolsterbeams and to eachother by tie-bolts c, that enter openings e and pass through the lugs c in the space between the beams. At their ends the side beams are securely connected by the guide-bolts f f, that secure the guide-plates F in place, and also pass through the blocks b. These are the only bolts that pass through the timber of which the bolster is composed, and therefore the liability of undue strain and weakness at these points, where openings for bolts are ordinarily required,is largely diminished.

The bolster is firmly braced by the longi-` tudinal truss-rods g g, which are connected at their ends by cross bars or ties g' g', that are secured by suitable nuts and rest against inclined shoulders formed in the upper part of the beams. These truss-rods engage with the usual grooved projections, hh, on the lower center plate, H, and thus centrally sustain the two spaced beams composing the bolster.

In the center of each of the metal plates G H is an opening, i, for the reception of the king-bolt, which passes through the space between the beams a a.

It is evident that as by this construction the usual necessity 'of boring the bolster at this point is obviated the consequent danger of strain and liability of fracture therefrom is also avoided.

By this construction it `is also possible to Ioo employ timbers of less than the dimensions ordinarily required, which involves an additional advantage, as such timbers may be obtained more conveniently and cheaply, and 5 usually are better seasoned.

What we claim is v l. A top bolster for car trucks, combining in its structure two parallel beams spaced by interposed end blocks', top and bottom center plates connected by bolts passing between the two beams and centrally perforated for the passage of the kingbolt between the spaced beams, and longitudinal truss rods, one for each beam, connected at their ends with cross- 15 bars, which abut against the beams, substantially as described. 2. In a top bolster for car trucks, the combination, with the parallel spaced beams havingintervenin g blocks at theirends and braced, 2o by longitudinal truss-rods, of top and bottom center plates having projecting central an ges arranged in the spaces between the beams and perforated for the passage of the king-bolt, substantially as set forth.

3. In a top bolster for cartrucks, the com- 2 5 bination of the side beams, a a, having intervening blocks b at their ends, perforated top and bottom center plates, Gr H, having central anges, c, and nipples d, and the longitudinal truss-rods g g, substantially as and for the purpose shown and described.

In testimony whereof we have hereunto set our hands in the presence of two subscribing witnesses.

WILLIAM J. MCGOY. BART DEAN.

Witnesses:

W. S. MCDONELD, GEORGE H. Voler. 

